The following list represents a collection of state highway system maps from 1912 until today in PDF format. The years represented cover each available edition (a new map was not published every year). Please keep in mind that these files are large in size – the older files are high-resolution scans from printed copies and the newer digital editions are very complex – and may take a while to download. If downloading "times-out" or is not recommended on your system, please try right-clicking on the Name represented by year, and then save the file locally first to your system before opening.